The article discusses the algorithm for finding the base of the Tatar verb by its infinitive derived by the author working on his own course of the Tatar language as a non-native. Its relevance lies in the fact that previously in Tatar philology no such algorithm was offered in any manual or reference publication, and the goal is to simplify the study of the Tatar language as a non-native providing its learners with a consistent way to get the base from any verb, which is a problem without such an algorithm. The material for the creation of this algorithm was lists of verbs from various sources including from the “Reverse Dictionary of the Tatar language” by M.Kh. Akhtyamov, as well as from Tatar-Russian dictionaries. The spelling of infinitives in disputable cases was checked by numerous dictionaries, including explanatory and translation ones offering examples of the use of verbs in written speech. According to the created algorithm, all verbs of the Tatar language are divided into four groups, and each of the groups has its own subsystem of rules. Determining the base of a verb in the Tatar language is a significant difficulty for a person starting to study it as a non-native, and the algorithm proposed by the author is intended to serve to some extent to solve this problem.

DATA REPORT article Front. Earth Sci., 02 June 2023Sec. Petrology Volume 11 - 2023 | https://doi.org/10.3389/feart.2023.1156559

The Eastern Mongolia volcanic area formed in the Late Mesozoic - Early Cenozoic within Central Asian Orogenic Belt. The main volcanic events of the area occurred in the Early Cretaceous when alkaline basaltic lavas erupted and formed the so-called cover volcanic complex. Geochemical and isotope features of the cover volcanic complex allowed researchers to identify the following mantle rocks as their source: metasomatized peridotites, eclogites, and pyroxenites. Thermodynamic modeling in alphaMELTS program was performed to determine whether the simultaneous melting of these rocks with subsequent processes of crystallization differentiation could lead to the formation of the studied rocks. The modeling results show that the melting of the most enriched with incompatible trace elements peridotites, eclogites, and pyroxenites cannot produce the rocks of the cover volcanic complex. At the same time, the mixing of peridotite- and eclogite-derived melts corresponds most closely to the mechanism of rock formation. However, Ti, K, P, Rb, and Sr enrichment of the studied rocks also requires participation in magma generation processes of mantle metasomatic veins enriched with rutile, apatite, phlogopite, and amphibole.

Similar to the other areas of the Late Cenozoic volcanic province of Central Asia, the Udokan volcanic plateau (UVP) was formed in the time span between the Middle Miocene and the Pleistocene. Its rocks are highly alkaline and vary from alkaline picrobasalts and basanites to alkaline trachytes. The compositional variations of the rocks were controlled by two differentiation trends, which corresponded to different generation conditions of the parental magmas. The rocks with low SiO2 contents (<45 wt

The Eastern Mongolian Volcanic Area (EMVA) is part of the Late Mesozoic–Early Cenozoic volcanic and plutonic belt in Northeastern Asia. The EMVA evolved in three stages, with volcanic rocks of different composition produced during each of the stages and with the parental melts of the rocks derived from different sources and formed by different mechanisms. The rocks of the Early Cretaceous stage (135–100 Ma), which form the volcanic flow complex of the EMVA, are predominantly differentiated alkali basaltoids. Data on isotopic features of these rocks, particularly their Pb isotope composition, allowed us to identify the nature of their sources: peridotites of the Continental Metasomatized Lithospheric Mantle (CMLM) and lower continental crustal eclogitic rocks. The alkali basaltoids of the extrusive complex of the Uldza-gol volcanic field were formed during the next evolution stage of the EMVA at 104–90 Ma. According to their geochemical and isotope features, the melts of these rocks were derived from the same sources as those of the volcanics of the previous Early Cretaceous stage, except only that eclogite material played a more significant role in forming of the Uldza-gol basaltoid melts. During the concluding stage of the EMVA evolution in the Late Cretaceous–Early Cenozoic (87–51 Ma), OIB-like rocks of the basanite–trachybasalt association were formed in the Central Gobi in the southwestern flank of the EMVA. Asthenospheric and recycled pyroxenite components, together with not so much CMLM peridotites, were involved in forming of these rocks. The various sources of the EMVA volcanic rocks reflect two mechanisms of their formation. In the Early to Late Cretaceous, magmatism was triggered by the ascent of the asthenospheric mantle and delamination of the lithospheric mantle, whereas the Early Cenozoic magmatism was induced by the activity of a mantle plume.